Drilling-machine.



B. w. FROST.

DBILLING MACHINE.

(Applicatien med Apr. 1v, i902 PatentedDec. 30, 19112.

INVENT'OR.

EEicE.

PATENT RICHARD W. FROST, OF DAR'IEN, CONNECTICUT.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 716,884, dated December30, 1902.

Application filed April 17, 1902.

To @ZZ whom it i12/tty concern,.-

Be it known that I, RICHARD W. Fnosr, a citizen of the United States,residing at Darien, county of Fairfield, State of Connecticut, haveinvented a new and useful Drilling- Machine, of which the following is aspecilication.

My invention has for its object to provide a simple, durable, andinexpensive portable drilling-machine adapted for general use, as uponstone, metal, or Wood, and to be operated either by power or by hand,and which is also provided with simple and easily-operated means forremoving a drill from a hole by power.

With these and yother objects in view the invention consists in certainconstructions and iu certain parts, improvements, and combinations whichwill be hereinafter described, and then specifically pointed out in theclaims hereunto appended. Y

In the accompanying drawings, forming part of this specification, Figure1 is a vertical section of my novel drilling-machine as in use, thedrill and drill-shaft appearing in elevation; Fig. 2, a section on theline 2 2'; Fig. 3, a section on the line 3 3; Fig. 4, an elevationillustrating my novel meansfor removing a drill by power, if required;and Fig. 5 is a plan View of the lifting mechanism detached.

A denotes the framework of my novel drilling-machine, which may comprisesimply uprights which also serve as legs, and horizontal plates 11,rigidly secured thereto. I have shown four uprights and four horizontalplates in the drawings, although the number of either is of course notof the essence of my invention. The uprights are shown as passingthrough holes in the plates, which may be rigidly looked thereto in anysuitable manner, as by set-screws 12, but in such a manner as to enablethe entire machine to be easily taken apart for transportation orstorage and set up wherever it may be required to use it.

13 denotes a drill which is detachably secured to a head 14, which inturn is detachably secured to the drill-shaft 15, set-screws 12 beingshown as a means of attaching the drill to the head and the head to theshaft. The shaft extends upward freely through' Serial No. 103.358.` (Nomodel.)

holes 16 in the horizontal plates, in which it rotates. The drill-shaftis made polygonal in form, so as to engage and be carried bya carrier17. This carrier is provided with an opening 19, corresponding in shapewith the cross-section of the drill-shaft, so as to engage it closely,but leaving the shaft free to move vertically in the opening. In thedrawings I have shown the drill-shaft incross-section asa square havingangular ribs 20 between the corners. The carrier liesbetweeu the twolower horizontal plates, the inner faces of said plates and the faces ofthe carrier being provided with circular grooves 21, which serve asball-races to receive balls 22, interposed between the carrier and theplates. Rotary motion may be imparted to the carrier in any ordinary orpreferred manner. I have shown the periphery of the carrieras providedwith bevel-gear teeth 23, which are engaged by corresponding gear-teethon a driving-wheel 24, mounted to turn on-a stud 25, carried by one ofthe horizontal plates. The hub of the driving-Wheel is shown as providedwith a groove 26 to receive a belt to drive the machine, or, ifpreferred, the driving-wheel may be turned by hand, a crank-handle 27being indicated by dotted lines. The upper end of the drillshaft engagesa correspondinglyshaped opening 28, Vpreferably tapered, as shown, in aguide-wheel 30, carried by a guide B, which is provided with holes31,7through which the uprights pass freely. I have shown the guide-wheelas secured to the drill-shaft by means of a set-screw 32 and have shownthe guide as consisting of upper and lower plates 33 and 34, which arerigidly secured together by bolts 35, the lower plate having au opening16, through which the drill-shaft passes freely. The upper and lowerplates of the guides are shown as provided in their inner faces withrecesses 36, which partly inclosethe guide-Wheel and the bottoms of therecesses, and the faces of the guide-Wheelare provided with circulargrooves 2l, which form ball-races to receive balls 22, interposedbetweenthe guide-wheel and the plate. The outer face of the upper plate33 of the guide is shown as provided with a recess to receive a lug 37upon a weight 38. Any number of these weights may be superposed abovethe guide to give the required amount of pres- ICO sure to the drill, itbeing noted that the entire weight of the guide-wheel, guide, and

weights if used rests upon the drill-shaft and' drill. I have shown oneside of the guide and all of the horizontal plates except the lower oneas cut away on one side, as at 39, to accommodate the driving-wheel, itbeing obvious that in use the guide may drop down until it comes intoengagement with the upper horizontal plate. It will of course beunderstood that in drilling a deep hole as soon as the drill has beenrun down far enough so that the guide is in contact with the upperhorizontal plate the drill-shaft and the drill are raised, the drillremoved, and a longer one attached to the shaft. In drilling deep holesit is sometimes quite diflicult to remove the drill from the hole.

In order that a long drill may be quickly and conveniently removed fromthe hole, I provide a lifter 40, which may be placed upon thedrill-shaft above the head and secured, as by set-screws 41, or may beattached to the shank of the drill below the head, if there is roomforit. I have shown the lifter as made trough-shaped and provided on itsedges on the open side with rack-teeth 42. These rackteeth are adaptedto be engaged by corresponding teeth on a pinion 43, carried by a shaft44, journaled in a suitable frame 45 and provided with a crank 46 forconvenience in operation. It will be obvious that a long drill may bequickly lifted out by placing the lifter upon,the drill-shaft, thensetting the frame in position, mounting the pinion thereon, the teeththereof being in engagement with the rack-teeth, and rotating the pinionby means of the crank.

The operation of my novel drilling-machine will be so obvious from thedescription already given that further description can hardly berequired. The drill-shaft is raised, a drill vattached thereto in themanner described, and then placed in position for use, and the guide,with weights thereon, if required, is placed in position on the upperend of the drill-shaft, and the machine is ready for work either by handor by the application of power to the driving-wheel, as by a belt.

Having thus described my invention, I claiml. A drilling-machinecomprising a frame formed of spaced-apart rods,removable platesadjustably secured to said rods, an angular drill-shaft working in saidplates, and a rotary driving-pinion having an opening corresponding tosaid shaft, said pinion being mounted between said plates.

2. A'drilling-machine comprising a frame formed of spaced-apartrods,removable plates adjustably secured to said rods, an angulardrill-shaft working in said plates, a rotary driving-pinion having anopening corresponding to said shaft, said pinion being mounted betweensaid plates, and a guide arranged to work loosely on said rods andengaging said shaft.

3. A drilling-machine comprising a frame formed of spaced-apartrods,removable plates adjustably secured to said rods, an angulardrill-shaft working in said plates, a rotary driving-pinion having anopening corresponding to said shaft, said pinion being mounted betweensaid plates, and a guide arranged to work loosely on said rods, saidguide having a rotary member in engagement with said shaft.

4. In a drilling-machine, the combination with uprights which also serveas legs and horizontal plates detachably secured to said uprights andhaving central openings, of an angular drill-shaft adapt-ed to turnfreely in said openings and a rotary carrier having an openingcorresponding with the cross-section of the drill-shaft through whichthe drillshaft may slide while receiving rotary motion therefrom.

5. A drilling-machine comprising a supporting-frame, an angulardrill-shaft having a tapered end, a rotary driving-pinion for saidshaft, and a guide for said shaft havingarotary member provided. with atapered opening arranged to receive the end of said shaft, said guidebeing free to slide upon said frame, whereby said shaft is' fed bygravity.

6. Adrilling-machinecomprisingasupporting-frame, an angular drill-shaft,a rotary driving-pinion therefor having an opening corresponding to thecross-section of said shaft, a vertically-movable guide comprising upperand lower plates, and a guide-disk mounted on said shaft and interposedbetween said plates.

7. Adrilling-machinecomprisingasupporting-frame, an angular drill-shaft,a rotary driving-pinion therefor having an opening corresponding to thecross-section of said shaft, a vertically-movable guide comprising upperand lower recessed plates, means for uniting said plates, and aguide-disk mounted on said shaft between said plates and working in therecessed portions of the latter.

8. In a drilling-machine the combination with framework, an angulardrill-shaft vertically movable therein and a rotary carrier mounted toturn in the framework and having an opening through which thedrill-shaft may slide while receiving rotary motion therefrom, ofa'guide vertically movable in the framework and carrying a guide-wheelengaged by the drill-shaft and a weight detachably secured to the guidefor applying additional pressure to the drill.

In testimony whereof I affix my signature in presence of two witnesses.

RICHARD W. FROST.

Witnesses:

A. M. WoosTER, S. W. ATHERTON.

IIO

